Flue-cutter.



UNITED STATES PATENT OFFICE.

JAMES A. BARHYDT, OF ROCHESTER, NEW YORK.

FLU E-CUTTER.

SPECIFICATION forming part of Letters Patent N 0. 646,722, dated April3, 1900. Application filed May 6, 1898. Serial No. 679,884. (No model.)

To all whom, it may concern:

Be it known thatl, JAMES A. BARHYDT, a citizen of the United States,residing at Rochester, in the county of Monroe, in the State of NewYork, have invented a certain new and useful Improvement inFlue-Cutters, of which the following is a description, referencebeinghad to the accompanying drawings, forming part of thisspecification.

My novel flue-cutter has been chiefly designed for cutting off the tipsof the fines of locomotive-boilers, but may be used for other purposes,as will'be understood from the explanation of it hereinafter given.

My invention hasfor its object the provision of a simple, com pact, andefiicient power driven cutter by which the tipsv of flues may be rapidlysevered from the bodies of the flues, and its novelty will behereinafter set fort-h, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of my newcutter; Fig. 2, a vertical longitudinal section of the same in the planeindicated by the dotted line 2 2 of Fig. 1 and with the cutter retractedtory to beginning the cutting operation; Fig. 3, a corresponding Viewwith the cutter forced outward to sever the tip fromrthe flue, and Fig.4 a vertical cross-section onthe line 4 4 of Fig. 2.

The same letters of reference are used to indicate the correspondingparts in the several views.

My novel cutter, as shown in the accompa nying drawings, is adapted tobe operated by any suitable power-driven device for the purpose-as, forinstance, by that shown in Patent No. 564,139, issued to me on July 14:,1896, for a machine for operating flue-expanderssuch machine being alsoadapted for the operation of flue-cutters.

In the accompanying drawings, A represents the cylindrical body of thetool, which is provided in the present instance with a forwardcylindrical chamber B and a larger rear chamber 0, which is in thepresent instance square in cross-section. Adapted to slide back andforth within the cylinderA is a stock or spindle D, which has a middlerectangular portion adapted to fit within the chamber 0 of the cylinderA and a forward prepara wedge portion E, adapted to travel back andforth in the forward chamber B of the cylinder and cooperate with thecutter in the manner hereinafter described. The rear end of the spindleor stock D consists of a tapering shank F, adapted to be inserted in thechuck or holding device of the power apparatus by which the tool isdriven. Between the parts D and F the spindle is provided with a flangeor collar G, the contact of which with the rear end of thecylinderAlimits the forward movement of the spindle. A washer H isfitted over the spindle immediately in front of the collar Grandinterposes between the collar and the rear end of the cylinder A whenthe spindle is moved forward to its limit of movement. By providing aconsiderable number ofthese washers and placing more or less of themupon the spindle the limit of forward movement of the latter may beregulated, as desired. The square middle portion of the spindle D isprovided upon one side with a longitudinal groove H, in which fits oneend of a screw (not shown) passed through the cylinder A near itsextreme rearward end, the engagement of which screw with the extremeforward endof the groove H serves to limit the rearward movement of thespindle D and prevent its being entirely withdrawn from the cylinder A.

The rear end of the'cylinderA is surrounded by a sleeve 1, having amilled exterior surface to facilitate its being grasped by the hand,such sleeve constituting the holdingpiece of the tool. cylinder A byscrews J J, passing through the sleeve I, and fitting in acircumferential groove in the cylinder A, the result of which connectionis that while the cylinder A is free to turn within the sleeve I itcannot move longitudinally independentlythereof. Within the sleeve I thecylinder A is in the present instance provided with two forwardly-facingannular shoulders, against which abut two correspondingrearwardly-facing shoulders upon the inner surface of the sleeve, thepurpose of which shoulders is to prevent rearward movement of the sleeveupon the cylinder when the front end of the sleeve is subjected topressure in the operation of the tool, as hereinafter described.

The cylinder A is provided about midway It is connected with the of thelength of its forward chamber B with a transverse recess K, in which isfitted a sliding block L, in which is journaled the hardenedcutting-disk M, the block L constituting the movable support or carrierfor said cutter. At its under side, Figs. 2 to 4, the block L isprovided with a recess shaped to receive and fit the wedge E,constituting the forward end of the spindle D. This wedge E is in thepresent instance provided upon its upper side with a projecting flangefitting in corresponding grooves in the walls of the recess in the blockL, so that not only will the forward movement of the spindle and wedgeserve to force the block and cutter outward, but their rearward movementwill serve to positively draw the block and cutter inward.

Forward of the cutter the cylinder A is surrounded by a short sleeve N,having a milled exterior surface, and held in place upon the cylinder bya nut O. This sleeve is free to turn upon the cylinder A, and itsexterior fits the interior of the tube and serves to support the forwardend of the cutter centrally in the tube as the cutter is turned therein.

The operation of the tool under the abovedescribed construction is asfollows: The parts of the tool being in the position shown in Figs. 1and 2 its forward end is inserted into the end of the flue whose tip isto be removed until the end of the flue abuts against the front end ofthe sleeve 1, as indicated by the dotted lines representing the flue inFig. 2. Then with the flue held firmly in fixed position the spindle ofthe tool is pressed forward and rapidly rotated by means of thepower-driven device heretofore referred to. The forward pressure uponthe spindle will cause its wedge to press the block L outward and forcethe edge of the cutting-disk M into contact with the inner surface ofthe fine, and it will be rapidly rolled around the inner surface of theflue and pressed against it upon the same line until it cuts through theflue and severs the tip therefrom, as indicated by the dotted lines ofthe flue and the position of the parts in Fig.

Having thus fully described my invention, I claim- 1. In a flue-cutterthe combination with a cylinder having forwardly-facing shoulders on itsexterior, a radially-movable cuttingtool in the cylinder, adriving-spindle longitudinally movable in the cylinder having provisionsfor moving the tool out, and a sleeve loosely mounted and securedagainst the longitudinal movement on the cylinder and having interiorshoulders corresponding with the shoulders on the cylinder.

2. In a flue-cutter, the combination of a rotatable cylinder carrying aradially-movable cutter, a non rotatable sleeve loosely encircling saidcylinder in rear of the cutter and having its forward end adapted toform an abutment for the end of the flue, and a driving-spindle fittingwithin the cylinder and adapted to rotate the same and to force thecutter outward as the spindle is pressed forward.

3. In a flue-cutter, the combination of a 1'0- tatable cylinder, atransversely movable block or carrier fitting in a recess therein, acutting-disk mounted in said block or carrier, at non-rotatable sleeveloosely encircling the cylinder in rear of the cutting-disk and adapt edto form an abutment for the end of the flue, and a driving-spindlefitting within the cylinder and adapted to rotate the same and to forcethe block or carrier outward and press the cutting-disk into contactwith the flue as the spindle is moved forward.

4. The herein-described flue-cutter, composed of the cylinder A, theblock L mounted in a transverse recess therein, the cuttingdisk Mmounted in the block L, the sleeve I encircling the cylinder A, and thespindle D turning with the cylinder A and having at its forward end thewedge E cooperating with the block L, and at its rear end the shank Fadapted to be held in the chuck of the powerdriven device.

5. The herein-described flue-cutter, composed of the cylinder A, theblock L fitting in a transverse recess therein, the cuttingdisk Mmounted in the block L, the sleeve 1 fitting around the cylinder A andconnected thereto by the screws J fitting the circumferential groove insaid cylinder, and the spindle D having the rectangular middle portionadapted to fit and travel in the chamber 0 of the cylinder, and theforward wedge portion E adapted to travel in the chamber B thereof andcooperate with the block L, and provided at its rear end with the flangeG and shank F.

JAMES A. BARHYDT.

Witnesses:

IRVING PAINE, J. C. YEAGER.

